Ingenious design With a transparent top plate, two plates and a thin wire pointer, the grout monitor accurately logs the opening and closing of joints. Two nails are removed and the log sheet provides accurate data. Improve accuracy in inspection Achieve high precision with a gap monitor resolution of 0.5 mm (0.02 in) and a wide horizontal range of 20 mm (0.79 in) and a vertical range of 10 mm (0.38 in). The XY axis scale is 1 mm (0.04 in) and the scale wire enables accurate and optimized measurements for your inspection requirements. Easy to use Thanks to its improved stability and user-friendly design with newly designed mounting posts, the grout monitor ensures precise placement without glue or complex assembly steps. Attach two plates to each other easily and conveniently. Advanced technology Material selection allows easy data reading. Made of high-quality ABS and acrylic materials that ensure excellent durability and stability. Use scenarios - Tile and grout inspections in residential or commercial spaces to monitor joint openings over time and catch cracking or settlement early. - Concrete slab or masonry projects where expansion joints must be tracked during curing, temperature changes, or load shifts. - Quality control during installation or refurbishment of ceramic tile, ensuring joint gaps are maintained accurately during setup and after completion. Specifications overview - Resolution: 0.5 mm (0.02 in) - Horizontal range: 20 mm (0.79 in) - Vertical range: 10 mm (0.38 in) - XY axis scale: 1 mm (0.04 in) - Materials: ABS and acrylic - Construction: transparent top plate, two plates, thin wire pointer - Data: log sheet provides accurate joint opening/closing data - Assembly: no glue required; easy mounting posts for stable placement